Revert 237280 "Remove TraceController"

trunk/src/chrome/common/automation_messages_internal.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Defines the IPC messages used by the automation interface.
 
 // NOTE: All IPC messages have either a routing_id of 0 (for asynchronous
 //       messages), or one that's been assigned by the proxy (for calls
 //       which expect a response).  The routing_id shouldn't be used for
 //       any other purpose in these message types.
@@ skipping 916 matching lines @@
 
 // Call BeginTracing on the browser TraceController. This will tell all
 // processes to start collecting trace events via base/debug/trace_event.h.
 IPC_SYNC_MESSAGE_CONTROL1_1(AutomationMsg_BeginTracing,
                             std::string /* category_patterns */,
                             bool /* success */)
 
 // End tracing (called after BeginTracing). This blocks until tracing has
 // stopped on all processes and all the events are ready to be retrieved.
 IPC_SYNC_MESSAGE_CONTROL0_2(AutomationMsg_EndTracing,
-                            base::FilePath /* result_file_path */,
+                            size_t /* num_trace_chunks */,
+                            bool /* success */)
+
+// Retrieve trace event data (called after EndTracing). Must call exactly
+// |num_trace_chunks| times.
+// TODO(jbates): See bug 100255, IPC send fails if message is too big. This
+// code can be removed if that limitation is fixed.
+IPC_SYNC_MESSAGE_CONTROL0_2(AutomationMsg_GetTracingOutput,
+                            std::string /* trace_chunk */,
                             bool /* success */)
 
 // Used on Mac OS X to read the number of active Mach ports used in the browser
 // process.
 IPC_SYNC_MESSAGE_CONTROL0_1(AutomationMsg_GetMachPortCount,
                             int /* number of Mach ports */)
 
 // Generic pyauto pattern to help avoid future addition of
 // automation messages.
 IPC_SYNC_MESSAGE_CONTROL2_2(AutomationMsg_SendJSONRequest,
                             int /* window_index */,
                             std::string /* JSON request */,
                             std::string /* JSON response */,
                             bool /* success */)